Engine cooling system



Jan. 14, 1941. A. DE MUYSER ENGINE COOLING SYSTEM Filed July 11, 1939 I no.3;

Hlfiorneys Patented Jan. 14, 1941 ENGHNE COOLING SYSTEM Alfred dc Muyser, Luxemburg, Luxemburg, as-

signor to Alliance Industrielle & Financiere Francaise, Socit Anonyme, Luxemburg, Luxemburg Application July 11, 1939, Serial No. 283,843

In Luxemburg 9 Claims.

The present invention relates to liquid circulation cooling systems for the engines serving to drive movable bodies, such for instance as automobiles, airplanes, etc.

It has been found that these engines become unduly hot when automobiles climb a hill or when airplanes climb after taking off. As a matter of fact, at this time, the engine develops considerable power without the speed of the movable body being sufiicient for compensating, through an increase of the circulation, for the rise of temperature corresponding to the increase of power developed.

The object of the present invention is to provide a cooling system which prevents rises; of temperature of engines of the type above mentioned without having recourse to radiators producing, under normal conditions, too considerable a head resistance.

According to an essential feature of the present invention, the cooling system includes at least one radiator constantly subjected to the action of air and at least one radiator arranged in such manner as to be subjected to the action of air only when so desired.

According to a preferred embodiment of the invention, the radiator or radiators which will be hereinafter called secondary radiators are connected in series with the main radiator or radiators and are mounted in such manner as to be retractable at will on the inside of the outer surface of the vehicle.

However, the invention is not in any way limited to this series connection arrangement.

Of course, when stating that the auxiliary radiator or radiators can be moved either on the inside or on the outside of the vehicle outer surfact, I do not mean that I am limited to the case in which this outer surface is fixed and the radiator or radiators movable with respect thereto. The displacement is of course relative, and the auxiliary radiator might as well be fixed in position while a portion of the vehicle external surface is movable with respect thereto.

Within the scope of my invention, there are many different combinations of main, and secondary radiators. For instance, I may provide a main radiator arranged in any known manner and two secondary radiators, disposed at the upper part of the cowl and adapted to be moved in and out at will.

According to a preferred arrangement, the secondary radiator or radiators are placed in such manner that, at least in their projecting position, they are located ahead of the engine and above January 31, 1939 (Cl. l23l'74) the upper part of the cylinders, in such manner that the cooling liquid is at a level higher than that of the upper part of the front cylinder. As a matter of fact, when climbing, it has been found that this is the part where heating is most considerable.

The arrangement according to the invention permits of obviating this difficulty. As for the main radiator, it can itself occupy any suitable position, in a manner known per so.

My invention further includes the provision of an automatic control (either combined or not with control meansv operated by the driver or pilot) working as a function, either of the inclination of the movable body with reference to a horizontal plane, or of the temperature of the cooling water (thermostatic device), or of any other variable factor.

Preferred embodiments of the present invention will be hereinafter described, with reference to the accompanying drawing, given merely by way of example, and in which:

Figs. 1 and 2 are two views of an embodiment as applied to an automobile vehicle.

Figs. 3 and 4 are two similar views of an embodiment of an application to an airplane.

Considering first Figs. 1 and 2, l is the hood of an automobile, 2 its engine, 3 the circulation pump, 4 the main radiator, 6 and l the connecting pipes, 5, two secondary radiators which can be brought either in the retracted position, as shown at 5a, 5a in Fig. 2 or in the raised position (see 5, 5, Fig. 2) or again in an intermediate position. The control of the displacements of these radiators can be eifected in any suitable manner, and be operated either by the driver or by an automatic device.

For instance, as shown by Fig. 1, each auxiliary radiator 5 is supported by a piston I2 movable in a. cylinder 13, adapted to be fed with compressed air from a reservoir l4 through a pipe I5. A valve it can be controlled by the pilot for sending compressed air into and out of cylinder l3. Automatic operation can be obtained as above stated by fitting the engine with thermostatic means ll, responsive to the temperature of said engine and adapted to control the feed and outflow of compressed air through conduit l5.

In Figs. 3 and 4, I have shown at H the fuselage of an airplane, at 8 its propeller. The elements of the engine and the cooling system thereof are designated by the same reference characters as in Figs. 1 and 2.

In a general manner, while I have, in the above description, disclosed what I deem to be practical and efiicient embodiments of the present invention, it should be well understood that I do not wish to be limited thereto as there might be changes made in the arrangement, disposition, and form of the parts without departing from the principle of the present invention as comprehended within the scope of the appended claims.

What I claim is:

1. In a vehicle having an outer surface in contact with air and provided with at least one engine, a cooling system for said engine which comprises, in combination, at least one main radiator carried in fixed position by said vehicle on the outside of said surface, and at least one secondary radiator carried by said vehicle, said secondary radiator and at least one portion of said outer surface being movable with respect to each other so that said secondary radiator is adapted to occupy either of two positions, one on the inside of said surface and the other on the outside thereof.

2. In a vehicle having an outer surface in contact with air and provided with at least one engine, a cooling system for said engine which comprises, in combination, at least one main radiator carried in fixed position by said vehicle on the outside of said surface, at least one secondary radiator carried by said vehicle, said secondary radiator and at least one portion of said outer surface being movable with respect to each other so that said secondary radiator is adapted to occupy either of two positions, one on the inside of said surface and the other on the outside thereof, and means for controlling the relative displacements of said secondary radiator and. the

corresponding portion of said surface.

3. In a vehicle having an outer surface, in contact with air and provided with at least one engine, a cooling system for said engine which comprises, in combination, at least one main radiator carried in fixed position by said vehicle on the outside of said surface, at least one secondary radiator carried by said vehicle, said secondary radiator and at least one portion of said outer surface being movable with respect to each other so that said secondary radiator is adapted to occupy either of two positions, one on the inside of said surface and the other on the outside thereof,- and means responsive to variations of a working characteristic of said vehicle for automatically controlling the relative displacements of said secondary radiator and the corresponding portion of said surface.

4. In a vehicle having an outer surface in contact with air and provided with at least one engine, a cooling system for said engine which comprises, in combination, at least one main radiator carried in fixed position by said vehicle on the outside of said surface, and at least one secondary radiator carried by said vehicle, said secondary radiator and at least one portion of said outer surface being movable with respect to each other so that said secondary radiator is adapted to occupy either of two positions, one on the inside of said surface and the other on the outside thereof, said secondary radiator being positioned above the top of the front cylinder of said engine.

5. In a vehicle having an outer surface in contact with air and provided with at least one engine, a cooling system for said engine which comprises, in combination, at least one main radiator carried in fixed position by said vehicle on the outside of said surface, and at least one secondary radiator movably carried by said vehicle so as to be able to occupy either of two positions with respect to said vehicle, one on the inside of said surface and the other on the outside thereof.

6. In a vehicle having an outer surface in contact with air and provided with at least one engine, a cooling system for said engine which comprises, in combination, at least one main radiator carried in fixed position by said vehicle on the outside of said surface, at least one secondary radiator movably carried by said vehicle so as to be able to occupy either of two positions with respect to said vehicle, one on the inside of said surface and the other on the outside thereof, and means for controlling the displacements of said auxiliary radiator with respect to said vehicle.

7. In a vehicle having an outer surface in contact with air and provided with at least one engine, a cooling system for said engine which comprises, in combination, at least one main radiator carried in fixed position by said vehicle on the outside of said surface, at least one secondary radiator movably carried by said vehicle so as to be able to occupy either of two positions with respect to said vehicle, one on the inside of said surface and the other on the outside thereof, and means responsive to variations of a working characteristic of said vehicle for automatically controlling the relative displacements of said secondary radiator with respect to said vehicle.

8. A cooling system according to claim 7 in which the working characteristic is the temperature of the engine.

9. A cooling system according to claim 7 in which said secondary radiator is so positioned as to be, when on the outside of said surface, at a level higher than that of the top of the front cylinder of the engine.

ALFRED DE MUYSER. 

